Voltaic cell.



No. 733,751. PATENTED JULY 14, 1903. G. T. RICHMOND & M. H. MOFF ETT.

VOLTAIO CELL.

APPLICATION FILED MAY 25, 1903.

N0 MODEL.

| I I l UNITED STATES Patented July 14, 1903.

1 PATENT OFFICE.

CHARLES T. RICHMOND AND MARCUS H. MOFFETT, OF CLEVELAND, OHIO,

ASSIGNORS TO THE NATIONAL CARBON COMPANY, OHIO, A CORPORATION OF NEW JERSEY.

"VOLT A CELL.

'PEOIFICATION forming part of Letters Patent N o. 733,751, dated July 14, 1903.

Application filed May 25, 1903. $erial No. 158,608. (No model.)

To aZZ whom it may concern Be it known that we, CHARLES T. RICHMOND and MARCUS H. MOFFETT, citizens of the United States, residing at Cleveland, in the 5 county of Ouyahoga and State of Ohio,ha ve invented a certain new and useful Improvement in Voltaic Cells, of which the following is a full, clear, and exact description, reference being had to the accompanying draw- IO ings.

The object of the invention is to produce a voltaic cell the parts of which will be cheaply constructed and easily and quickly assembled in operating relationship. A

The invention may be summarized as consisting in the combination of parts hereinafter described, and pointed out definitely in the claims.

In the drawings, Figure 1 is a central vertical sectional View of the cell embodying the invention. Fig. 2 is a transverse sectional View on the line 2 2 of Fig. 1, and Fig 3 is a perspective View of the dome-shaped nut by which the carbon electrode is secured to the cover.

Referring to the parts by letters, A represents a cover which is made of insulatingmaterial and is adapted to rest on top of the jar, which is shown in dotted lines. A substantially central hole a, is formed through this cover, as is alsoa second hole ct. (Shown in Fig.2 and indicated by dotted lines in Fig. 1.) On the under side of this cover is an annular downwardly-extended flange (1 which 5 is concentric with the hole a.

B represents the carbon electrode in the form of a hollowcylinder having external longitudinal grooves. The top of this carbon electrode is squared 0E-in other words, is in a 0 plane substantially at right angles to the axis of the cylinder. Projecting upward from this squared-off end is a boss I), which passes through the hole ain the cover. A metallic screw 0 is embedded in this boss and extends upward therefrom. D represents a dome.- shaped nut, which screws onto this screw 0, and its lower edge, which is of greater diameter than the hole a, bears 'upon the top of the cover, and thereby the squared-off upper endof the carbon electrode is drawn tightly against the under side of the cover,wherefore it will keep a position at right angles thereto.

OF CLEVELAND,

This dome-shaped nut serves the additional purpose of substantially sealing the hole a.

E represents the zinc electrode, which is in the usual form of a split cylinder, and it is of r such diameter as to snugly embrace the flange a of the cover. The top edge of this cylinder is all in a plane which is substantially at right angles to the axis of the cylinder. This zinc electrode is provided with a threaded stem e, which extends up through the hole a in the cover,and a nut f, which screws thereon, holds the upper end of the zinc electrode against the under side of the cover embracing the flange a wherefore this zinc also stands at substantially right angles to the cover, and therefore at all points the same distance away from the external surface of the electrode B, and this makes it unnecessary to hold these two electrodes apart by rubber plugs or rings, as is customary in many constructions. The carbon electrode is hollow and is open at the lower end only, and this opening is closed by a removable plug G, which screws into the same.

Having described our invention,we claim- 1.. The combination of a cover of insulating material in which are the two holes a, a, and

which has on its under side an annular flange a with a carbon electrode having a squaredoff upper end, and a boss projecting upward from the same through the hole ct of the cover, a screw 0 embeddedin and projecting upward from said boss, a dome -shaped nut which screws upon said screw and whose lower edge bears upon the top of the cover around said hole a, substantially as specified.

2. Thecombination of a cover of insulating material in which are two holes a,a, and which has on its under side an annular flange aiwith a carbon electrode having a squared-off upper end, and aboss projecting. upward from the same through the hole a of the cover, a screw O embedded in and projecting upward from said boss, a dome-shaped nut which screws upon said screw and whose lower edge bears upon the top of the cover around said holesa,

a, a zinc electrode in the form of a split cylinder which embraces the flange on the cover and whose upper end bears against the upper side of the cover, said zinc electrode having a threaded stem which extends upward through the hole ct of the cover and a nut F which screws onto said threaded stem, substantially as specified.

3. The combination of a cover of insulating materialin which are two holes a,a ,and which has on its under side an annular flange a a carbon electrode having a squared-off upper end, and a boss projecting upward from the same through the hole a of the cover, and a screw 0 embedded in and projecting upward CHARLES T. RICHMOND. MARCUS H. MOFFETT.

Witnesses:

HENRY KWILUs, E. G. ERNST. 

